Update to Windows 10, versions 1507, 1511, 1607, 1703, 1709, 1803, 1809, 1903, and 1909 for update reliability

Applies to: Windows 10, version 1909, all editionsWindows 10, version 1903, all editionsWindows 10, version 1809, all editions


This update includes reliability improvements to Windows Update Service components in consumer Windows 10, versions 1507, 1511, 1607, 1703, 1709, 1803, 1809, 1903, and 1909. It may take steps to free up disk space on your device if you do not have enough disk space to install Windows updates.

This update includes files and resources that address issues that affect the update processes in Windows 10 that may prevent important Windows updates from being installed. These improvements help make sure that updates are installed seamlessly on your device, and they help improve the reliability and security of devices that are running Windows 10.

Notes about this update

  • This update may request your device to stay awake longer to enable installation of updates.

    Note The installation will respect any user-configured sleep configurations and also your "active hours" when you use your device the most.

  • This update may try to reset network settings if problems are detected, and it will clean up registry keys that may be preventing updates from being installed successfully.
  • This update may repair disabled or corrupted Windows operating system components that determine the applicability of updates to your version of Windows 10.
  • This update may compress files in your user profile directory to help free up enough disk space to install important updates.
  • This update may reset the Windows Update database to repair the problems that could prevent updates from installing successfully. Therefore, you may see that your Windows Update history was cleared.

Important information about devices that have low disk space

When a Windows feature update is available for your device, you may see a message on the Windows Update settings page or elsewhere that asks you to free up disk space by removing files or applications that you do not use regularly. If you see this message, select Fix issues to free up disk space on your device.

After the Windows update has installed, some users may be prompted to restart their device. See Free up drive space in Windows 10 for more information about other ways that you can free up disk space on your device.

Compressing files

To help free up disk space, this update may compress files in your user profile directory so that Windows Update can install important updates. When files or folders are compressed, they appear as having two blue arrows overlaid on the icon. Depending on your File Explorer settings, you may see icons that look larger or smaller. The following screen shot shows an example of these icons.

Icons of compressed files

After you install the update, your files are restored to their original state, and the blue arrows disappear from the file icons in File Explorer. At any point during the update process, you should be able to access your files.

Microsoft Support notification

This update may display a notification on devices that are running low on space. If selected, this notification will open a Microsoft Support URL in the default browser with contact options for Microsoft support so you can easily get help freeing up space on your device.

This PC is running low on space

Disk Cleanup

When this update is installed, new options for cleaning up disk space will be available to make it easier for you to update your device when it is low on disk space. If a feature update fails due to a low disk space, you can help increase storage space by using the Disk Cleanup tool or selecting “Free up space now” in Settings / Storage. These will help you remove unused files and free up storage space before a major feature update.

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How to get this update

Release Channel Available Next Step
Windows Update and Microsoft Update Yes

None. This update will be downloaded and installed automatically from Windows Update.

It is also offered directly to Windows Update Client for some devices that have not installed the most recent updates.

Microsoft Update Catalog Yes To get the standalone package for this update, go to the Microsoft Update Catalog website.


Windows Server Update Services (WSUS) No

See the other options.


Update removal information

To uninstall this update, follow these steps:

  1. Click Start and then type cmd.exe.
  2. Right-click Command Prompt and then click Run as administrator.
  3. In the Administrator: Command Prompt window, type one of the following commands as appropriate for your system:
    • For ARM-based systems: msiexec.exe /x {9C2C39FE-FDA8-4024-AE74-F06716B22D58}
    • For x64-based systems: msiexec.exe /x {32DC821E-4A7D-4878-BEE8-337FA153D7F2}
    • For x86-based systems: msiexec.exe /x {5F01BF33-E873-4B83-B2CC-E4DEF494073E}

Update replacement information

This update replaces the previously released update KB4022868.

File information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and times may change when you perform certain operations on the files.

Windows 10, version 1903 and 1909

Windows 10, version 1809

Windows 10, versions 1507, 1511, 1607, 1703, 1709, and 1803